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<div id="overview"><a href="../../../../../../apidocs/com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">View Javadoc</a></div><pre>

<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> * SimpleSessionHistoryManager.java</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> * Created on June 27, 2007, 12:38 PM</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> * To change this template, choose Tools | Template Manager</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> * and open the template in the editor.</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> */</em>
<a name="9" href="#9">9</a>   <strong class="jxr_keyword">package</strong> com.totsp.gwittir.client.flow;
<a name="10" href="#10">10</a>  
<a name="11" href="#11">11</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.client.History;
<a name="12" href="#12">12</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.client.ui.Widget;
<a name="13" href="#13">13</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.log.Level;
<a name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.log.Logger;
<a name="15" href="#15">15</a>  
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.ui.BoundWidget;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.HashMap;
<a name="20" href="#20">20</a>  
<a name="21" href="#21">21</a>  
<a name="22" href="#22">22</a>  <em class="jxr_javadoccomment">/**</em>
<a name="23" href="#23">23</a>  <em class="jxr_javadoccomment"> *</em>
<a name="24" href="#24">24</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="mailto:cooper@screaming-penguin.com" target="alexandria_uri">mailto:cooper@screaming-penguin.com</a>"&gt;Robert "kebernet" Cooper&lt;/a&gt;</em>
<a name="25" href="#25">25</a>  <em class="jxr_javadoccomment"> */</em>
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../com/totsp/gwittir/client/flow/AbstractHistoryManager.html">AbstractHistoryManager</a> {
<a name="27" href="#27">27</a>      <strong class="jxr_keyword">private</strong> ArrayList states = <strong class="jxr_keyword">new</strong> ArrayList();
<a name="28" href="#28">28</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> ignoreNext = false;
<a name="29" href="#29">29</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> currentState = -1;
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Creates a new instance of <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a> */</em>
<a name="32" href="#32">32</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a>() {
<a name="33" href="#33">33</a>      }
<a name="34" href="#34">34</a>  
<a name="35" href="#35">35</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> apply(String historyToken) {
<a name="36" href="#36">36</a>          HashMap values = <strong class="jxr_keyword">this</strong>.parseHistoryToken(historyToken);
<a name="37" href="#37">37</a>  
<a name="38" href="#38">38</a>          <strong class="jxr_keyword">if</strong>((values.get(<span class="jxr_string">"s"</span>) == <strong class="jxr_keyword">null</strong>) ||
<a name="39" href="#39">39</a>                  (Integer.parseInt(values.get(<span class="jxr_string">"s"</span>).toString()) == currentState)) {
<a name="40" href="#40">40</a>              <strong class="jxr_keyword">return</strong>;
<a name="41" href="#41">41</a>          }
<a name="42" href="#42">42</a>  
<a name="43" href="#43">43</a>          <strong class="jxr_keyword">int</strong> targetState = Integer.parseInt(values.get(<span class="jxr_string">"s"</span>).toString());
<a name="44" href="#44">44</a>          Logger.getAnonymousLogger().log( Level.SPAM,<span class="jxr_string">"Repositioning to state: "</span> + targetState + <span class="jxr_string">" of "</span> +
<a name="45" href="#45">45</a>              states.size() + <span class="jxr_string">"from "</span> + currentState, <strong class="jxr_keyword">null</strong>);
<a name="46" href="#46">46</a>  
<a name="47" href="#47">47</a>          <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = currentState; i != targetState;
<a name="48" href="#48">48</a>                  i = (i &gt; targetState) ? (i - 1) : (i + 1)) {
<a name="49" href="#49">49</a>              Logger.getAnonymousLogger().log( Level.SPAM,<span class="jxr_string">"\tCalling intermediate state "</span> + i, <strong class="jxr_keyword">null</strong>);
<a name="50" href="#50">50</a>              callState(i);
<a name="51" href="#51">51</a>          }
<a name="52" href="#52">52</a>  
<a name="53" href="#53">53</a>          callState(targetState);
<a name="54" href="#54">54</a>  
<a name="55" href="#55">55</a>          currentState = targetState;
<a name="56" href="#56">56</a>      }
<a name="57" href="#57">57</a>  
<a name="58" href="#58">58</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> callState(<strong class="jxr_keyword">int</strong> index) {
<a name="59" href="#59">59</a>          <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">State</a> state = (State) states.get(index);
<a name="60" href="#60">60</a>          ignoreNext = <strong class="jxr_keyword">true</strong>;
<a name="61" href="#61">61</a>          FlowController.call(state.context, state.name, state.model);
<a name="62" href="#62">62</a>          ignoreNext = false;
<a name="63" href="#63">63</a>      }
<a name="64" href="#64">64</a>  
<a name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> transition(String name, <a href="../../../../../com/totsp/gwittir/client/ui/BoundWidget.html">BoundWidget</a> old, <a href="../../../../../com/totsp/gwittir/client/ui/BoundWidget.html">BoundWidget</a> current) {
<a name="66" href="#66">66</a>          <strong class="jxr_keyword">if</strong>(ignoreNext) {
<a name="67" href="#67">67</a>              <strong class="jxr_keyword">return</strong>;
<a name="68" href="#68">68</a>          }
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>          <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">State</a> state = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">State</a>();
<a name="71" href="#71">71</a>          state.context = FlowController.findContextWidget((Widget) current, name);
<a name="72" href="#72">72</a>          state.name = name;
<a name="73" href="#73">73</a>          state.model = current.getModel();
<a name="74" href="#74">74</a>          currentState++;
<a name="75" href="#75">75</a>  
<a name="76" href="#76">76</a>          <strong class="jxr_keyword">while</strong>(states.size() &lt; (currentState + 1)) {
<a name="77" href="#77">77</a>              states.add(<strong class="jxr_keyword">null</strong>);
<a name="78" href="#78">78</a>          }
<a name="79" href="#79">79</a>  
<a name="80" href="#80">80</a>          states.set(currentState, state);
<a name="81" href="#81">81</a>          Logger.getAnonymousLogger().log( Level.INFO,<span class="jxr_string">"Transitioning to state: "</span> + currentState + <span class="jxr_string">" of "</span> +
<a name="82" href="#82">82</a>              states.size(), <strong class="jxr_keyword">null</strong>);
<a name="83" href="#83">83</a>  
<a name="84" href="#84">84</a>          HashMap values = <strong class="jxr_keyword">this</strong>.parseHistoryToken(History.getToken());
<a name="85" href="#85">85</a>          values.put(<span class="jxr_string">"s"</span>, Integer.toString(currentState));
<a name="86" href="#86">86</a>          History.newItem(<strong class="jxr_keyword">this</strong>.generateHistoryToken(values));
<a name="87" href="#87">87</a>      }
<a name="88" href="#88">88</a>  
<a name="89" href="#89">89</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">State</a> {
<a name="90" href="#90">90</a>          Object model;
<a name="91" href="#91">91</a>          String name;
<a name="92" href="#92">92</a>          Widget context;
<a name="93" href="#93">93</a>      }
<a name="94" href="#94">94</a>  }
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